| 摘要 |
PURPOSE:To perform inexpensive and simple control of tension, by a method wherein, when a material conveyed is wound by means of a winder, an electric motor is controlled through estimation of tension from the current of the armature of an electric motor for the winder, the rotation speed of the electric motor, and the conveying speed of a material. CONSTITUTION:In a block L surrounded with a broken line, according to motor generating torque mel computed by a controller at a preceding stage, tension Z of a material is computed, and based on a deviation between such computed value and a desired value of tension, the rotation speed of the electric motor for winder is controlled. In this system, a tension estimating means M, which estimates tension by means of a current ia of the armature of the electric motor, a rotation speed nM of the electric motor, and a conveying speed VE of a material, is provided, a device is functioned so that, according to a change in the 3 input signals, an internal state is balanced through a feedback action in a tension set means M, a tension estimating value is outputted when the state is balanced, and the estimating value is used instead of an actual value Z to control the tension by feedback. |
